I've done it on three balls. It will take the "paint" off but if you scrape the plug material off, ( provided you can use plug) and then use a small file to get within a grease pen. lead depth, use 1000 grit pad and it works out nice.
Does it take a while...YOU BET ! But the look on the boys and then the 4 yr old girls faces were better than the time spent. Can you make any money off the job ? Shoot no, took me 2 days on one and 4 days on the other.
IF, again IF it's a dark ball like the Hulk figure, you will make it a nice white, I tried dark balls and did not have any luck. I've done a Breast Cancer, Princess and an eye ball, ball those worked, but again, VERY timely !
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az guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net
www.rlbowlerspro.com